MARLEY

if you pull off the lower door trims you can push the wire all the way without taking your car to bits. in the boot lower trim remove 4 black plugs first then they all the panels pull off. 2 torx screws hold the sides . remove the screws and you will then gain enough access without taking them off just pull them out a bit. make a hole in the grommet in the floor you will see it push your wire through cable tie it out of the way of your exhaust pipe .

hi I have just wired up my car for caravanning. you will need to run a 40amp cable from the fuse box passenger well to the rear of the car. I fitted a towing relay because this dose all the work rather than running up to 4 cables from the front. you can use the spare orange wire in the right hand side of the boot and change the fuse for a 30amp. but you may need more current than it can supply safely. I used this wire to power up the running lights via a canbus relay.
 
anyway I would run the one wire. the fuse box will drop down and you can connect to a main feed wire from the battery ( a permanent live ) bare a small portion of the wire and solder this connection and put on plenty of insulation. leave your self a few inches of wire and fit an inline fuse. remove the fuse until all your wiring has been fitted. run the wire to a caravan towing relay and the numbers on the relay relate to the pin numbers on your 12s socket.
 
hope this helps simon

i got my egr blank fitted to my focus finally.

guide

remove wipers
remove scuttle panel
remove trim under scuttle panel
remove 2 screws and metal gasket
replace metal gasket with blank using the 2 screws previously removed
replace the trim, scuttle panel and wiper arms

jobs done - 20 mins

[attachment=5465:egr blank1.jpg]

I'd check the door sill rubbers for perishing and around locks and bolt holes.
I'm pretty sure there should be drainage slots on the door bottoms.
Maybe a good blast with an air line to clear them out?